Transitional user interface for a portion of a display screen



FIG. 1 is a front view of a transitional user interface for a portion of a display screen showing the new design in a first state;

FIG. 2 is a front view thereof in a second state;

FIG. 3 is a front view thereof in a third state;

FIG. 4 is a front view thereof in a fourth state;

FIG. 5 is a front view thereof in a fifth state;

FIG. 6 is a front view thereof in a sixth state; and,

FIG. 7 is a front view thereof in a seventh state.

The appearance of the transitional user interface sequentially transitions between the images shown in FIGS. 1-7. The process or period in which one image transitions to another image forms no part of the claimed design.

The chain line showing of areas within the transitional icon in FIGS. 1-7 form no part of the claimed design. The broken line showing of letters and shapes within the transitional icon in FIGS. 1-7 form no part of the claimed design. 

The ornamental design for a transitional user interface for a portion of a display screen, as shown and described. 